Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 10 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/11/2021   18:35:56   (   0.06, -75.19) (   0.34, -74.02)  133.76                80
 10/13/2021   07:00:02   (  -0.05, -75.19) (   0.82, -79.19)  455.23                80
 10/14/2021   06:38:24   (  -0.06, -75.19) (  -0.20, -74.60)   68.06                80
 10/16/2021   18:41:02   (   0.06, -75.20) (   0.09, -75.22)    3.09                80
 10/19/2021   06:46:09   (  -0.06, -75.23) (   0.05, -75.79)   63.41                80
 10/20/2021   06:24:31   (  -0.06, -75.24) (  -0.97, -71.20)  461.26                80
 10/21/2021   18:48:46   (   0.05, -75.26) (  -0.22, -76.40)  129.92                80
 10/22/2021   18:27:09   (   0.05, -75.28) (   0.86, -71.82)  395.11                80
 10/24/2021   06:51:14   (  -0.04, -75.31) (   0.35, -76.98)  190.59                80